Interface an 8255 to an 8086. Program Port A as output and connect it to 8 LEDs. Program Port B as input and connect it to 8 DIP switches. Write assembly code that reads the switches (Port B) and displays the value on the LEDs (Port A). Hall provides the exact initialization control word ( 90H for Mode 0, Ports A and C out, Port B in).
This version teaches the 16-bit architecture used in early IBM PCs, focusing on programming, system connections, and peripheral interfacing . Microprocessors And Interfacing Douglas V Hall 3rd Edition
While newer editions of other texts jumped immediately to high-level languages, Hall’s 3rd Edition doubles down on the 8086 family as a teaching vehicle. The rationale is sound: the 8086 offers a clean, understandable register model (AX, BX, CX, DX) and a straightforward segmented memory model. Hall meticulously deconstructs the minimum and maximum modes of operation. His explanation of the Ready pin, the Hold and HLDA pins, and the Queue status is legendary among readers. By mastering the 8086’s timing diagrams, a student implicitly understands the foundation upon which all modern x86 processors are built. Interface an 8255 to an 8086
Douglas V. Hall Edition: 3rd Edition (Revised by S.S. S. P. Rao) Publisher: McGraw-Hill Focus: Intel 8086 and 8088 microprocessors Write assembly code that reads the switches (Port
While the 3rd edition is widely used for Intel 8086 instruction, different regional or specialized versions of this book may prioritize different architectures: